Table 5 Characteristics of patients before and after PSM between group A and group B.
Variable | Before PSM (n, %) | P | After PSM (n, %) | P | ||||
|---|---|---|---|---|---|---|---|---|
Total (n = 2244) | Group A (n = 245) | Group B (n = 1999) | Total (n = 482) | Group A (n = 241) | Group B (n = 241) | |||
Age | 0.006 | 0.949 | ||||||
80–84 years | 1281(57.09) | 163 (66.53) | 1118 (55.93) | 315 (65.35) | 159 (65.98) | 156 (64.73) | ||
85–89 years | 661(29.46) | 59 (24.08) | 602 (30.12) | 119 (24.69) | 58 (24.07) | 61 (25.31) | ||
≥ 90 years | 302(13.46) | 23 (9.39) | 279 (13.96) | 48 (9.96) | 24 (9.96) | 24 (9.96) | ||
Sex | 0.685 | 0.316 | ||||||
Male | 1564 (69.70) | 168 (68.57) | 1396 (69.83) | 342 (70.95) | 166 (68.88) | 176 (73.03) | ||
Female | 680 (30.3) | 77 (31.43) | 603 (30.17) | 140 (29.05) | 75 (31.12) | 65 (26.97) | ||
Marital status | 0.743 | 0.676 | ||||||
Married | 1108 (49.38) | 126 (51.43) | 982 (49.12) | 242 (50.21) | 124 (51.45) | 118 (48.96) | ||
Single | 1020 (45.45) | 108 (44.08) | 912 (45.62) | 214 (44.4) | 106 (43.98) | 108 (44.81) | ||
Unknown | 116 (5.17) | 11 (4.49) | 105 (5.25) | 26 (5.39) | 11 (4.56) | 15 (6.22) | ||
Race | 0.165 | 0.441 | ||||||
White | 2036 (90.73) | 215 (87.76) | 1821 (91.10) | 418 (86.72) | 211 (87.55) | 207 (85.89) | ||
Asian | 133 (5.93) | 21 (8.57) | 112 (5.60) | 49 (10.17) | 21 (8.71) | 28 (11.62) | ||
Black | 75 (3.34) | 9 (3.67) | 66 (3.30) | 15 (3.11) | 9 (3.73) | 6 (2.49) | ||
Location | 0.080 | 0.923 | ||||||
Cervical | 239 (10.65) | 26 (10.61) | 213 (10.66) | 55 (11.41) | 26 (10.79) | 29 (12.03) | ||
Thoracic | 473 (21.08) | 64 (26.12) | 409 (20.46) | 120 (24.9) | 62 (25.73) | 58 (24.07) | ||
Abdomen | 1208 (53.83) | 130 (53.06) | 1078 (53.93) | 254 (52.7) | 128 (53.11) | 126 (52.28) | ||
Unknown | 324 (14.44) | 25 (10.20) | 299 (14.96) | 53 (11) | 25 (10.37) | 28 (11.62) | ||
Size | 0.168 | 0.976 | ||||||
1–3 cm | 546 (24.33) | 71 (28.98) | 475 (23.76) | 184 (38.17) | 91 (37.76) | 93 (38.59) | ||
4–6 cm | 468 (20.86) | 48 (19.59) | 420 (21.01) | 178 (36.93) | 91 (37.76) | 87 (36.10) | ||
7–9 cm | 254 (11.32) | 32 (13.06) | 222 (11.11) | 72 (14.94) | 36 (14.94) | 36 (14.94) | ||
≥10 cm | 976 (43.49) | 94 (38.37) | 882 (44.12) | 48 (9.96) | 23 (9.54) | 25 (10.37) | ||
Histology | 0.230 | 0.587 | ||||||
Adenocarcinoma | 1214 (54.10) | 120 (48.98) | 1094 (54.73) | 242 (50.21) | 118 (48.96) | 124 (51.45) | ||
Squamous | 876 (39.04) | 107 (43.67) | 769 (38.47) | 202 (41.91) | 106 (43.98) | 96 (39.83) | ||
Others | 154 (6.86) | 18 (7.35) | 136 (6.80) | 38 (7.88) | 17 (7.05) | 21 (8.71) | ||
Grade | 0.822 | 0.457 | ||||||
G1 | 248 (11.05) | 29 (11.84) | 219 (10.96) | 62 (12.86) | 34 (14.11) | 28 (11.62) | ||
G2 | 848 (37.79) | 95 (38.78) | 753 (37.67) | 187 (38.80) | 97 (40.25) | 90 (37.34) | ||
G3 + G4 | 1148 (51.16) | 121 (49.39) | 1027 (51.38) | 233 (48.34) | 110 (45.64) | 123 (51.04) | ||
Stage | 0.001 | 0.613 | ||||||
Local | 778 (34.67) | 112 (45.71) | 666 (33.32) | 207 (42.95) | 103 (42.74) | 104 (43.15) | ||
Regional | 1015 (45.23) | 94 (38.37) | 921 (46.07) | 182 (37.76) | 95 (39.42) | 87 (36.10) | ||
Distant | 451 (20.10) | 39 (15.92) | 412 (20.61) | 93 (19.29) | 43 (17.84) | 50 (20.75) | ||
T Stage | 0.220 | 0.996 | ||||||
T1 | 755 (33.65) | 80 (32.65) | 675 (33.77) | 136 (28.22) | 67 (27.80) | 69 (28.63) | ||
T2 | 260 (11.59) | 35 (14.29) | 225 (11.26) | 64 (13.28) | 32 (13.28) | 32 (13.28) | ||
T3 | 647 (28.83) | 77 (31.43) | 570 (28.51) | 152 (31.54) | 77 (31.95) | 75 (31.12) | ||
T4 | 582 (25.94) | 53 (21.63) | 529 (26.46) | 130 (26.97) | 65 (26.97) | 65 (26.97) | ||
N Stage | 0.443 | 0.927 | ||||||
N0 | 1460 (65.06) | 154 (62.86) | 1306 (65.33) | 275 (57.05) | 137 (56.85) | 138 (57.26) | ||
N+ | 784 (34.94) | 91 (37.14) | 693 (34.67) | 207 (42.95) | 104 (43.15) | 103 (42.74) | ||
M Stage | 0.073 | 0.578 | ||||||
M0 | 1671 (74.47) | 194 (79.18) | 1477 (73.89) | 379 (78.63) | 192 (79.67) | 187 (77.59) | ||
M+ | 573 (25.53) | 51 (20.82) | 522 (26.11) | 103 (21.37) | 49 (20.33) | 54 (22.41) | ||
CDS | 0.000 | 0.443 | ||||||
Yes | 299 (13.32) | 55 (22.45) | 244 (12.21) | 107 (22.20) | 50 (20.75) | 57 (23.65) | ||
No | 1945 (86.68) | 190 (77.55) | 1755 (87.79) | 375 (77.80) | 191 (79.25) | 184 (76.35) | ||
Radiotherapy | 0.508 | 0.900 | ||||||
Yes | 2133 (95.05) | 235 (95.92) | 1898 (94.95) | 407 (84.44) | 204 (84.65) | 203 (84.23) | ||
No | 111 (4.95) | 10 (4.08) | 101 (5.05) | 75 (15.56) | 37 (15.35) | 38 (15.77) | ||
Chemotherapy | < 0.001 | 0.228 | ||||||
Yes | 698 (31.11) | 109 (44.49) | 589 (29.46) | 197 (40.87) | 105 (43.57) | 92 (38.17) | ||
No/Unknown | 1546 (68.89) | 136 (55.51) | 1410 (70.54) | 285 (59.13) | 136 (56.43) | 149 (61.83) | ||
CDS + RT | 0.022 | 0.687 | ||||||
Yes | 80 (3.57) | 15 (6.12) | 65 (3.25) | 26 (5.39) | 14 (5.81) | 12 (4.98) | ||
No/Unknown | 2164 (96.43) | 230 (93.88) | 1934 (96.75) | 456 (94.61) | 227 (94.19) | 229 (95.02) | ||
CDS + CT | 0.019 | 0.659 | ||||||
Yes | 46 (2.05) | 10 (4.08) | 36 (1.80) | 14 (2.9) | 8 (3.32) | 6 (2.49) | ||
No | 1215 (54.14) | 119 (48.57) | 1096 (54.83) | 247 (51.24) | 119 (49.38) | 128 (53.11) | ||
Unknown | 983 (43.81) | 116 (47.35) | 867 (43.37) | 221 (45.85) | 114 (47.30) | 107 (44.40) | ||
